Updated: April 1, 2020 12:15 AM EDT | Originally published: March 11, 2020 1:01 PM EDT

Since the first case of COVID-19 was identified in central China in December, the illness has spread across the world, leading to an outbreak that the World Health Organization has called a pandemic. The maps and charts below show the extent of the spread, and will be updated daily with data gathered from over a dozen sources by the Johns Hopkins University Center for Systems Science and Engineering.

Where COVID-19 has spread in the U.S.

On March 26, the U.S. passed China to become the country with the most confirmed cases of the novel coronavirus in the world, and the numbers continue to grow at a rapid rate. As of March 31, it has reported nearly 190,000 cases across all 50 states, as well as the District of Columbia, Guam, Puerto Rico, and the U.S. Virgin Islands.

The largest cluster by far is in New York City, but there are also significant outbreaks in New Jersey, California, Washington state, Florida, Michigan, Wisconsin, Massachusetts, and Louisiana.

Is the U.S. “Flattening the Curve”?

If a community enacts the right protective measures early enough in the process, it can avoid a local outbreak that rapidly spins out of control and turns into a crisis. The goal is to avoid a sharp, concentrated uptick in cases that exceeds the capacity of the health care system, in favor of a lengthier outbreak that stays within the bounds of what the system can handle—resulting in fewer people getting sick and dying overall. This is what experts call “flattening the curve.” The following charts show how 10 nations, including the U.S., have either managed to stem the tide of the novel coronavirus, or are poised for an explosive growth in cases.

Where COVID-19 has spread around the world

Some 180 countries and territories, representing every corner of the globe, have now reported at least one case of the novel coronavirus. In total, there are now well over 800,000 confirmed cases and over 40,000 related deaths.

Which countries have the most COVID-19 cases?

As of March 26, the U.S. has the most confirmed cases of the novel coronavirus, and in the days since, the numbers there have grown rapidly. However, the U.S. has seen fewer deaths compared to other countries with high case counts like China, Italy, and Spain.

China, where the virus was first identified, and which had long been the country most impacted by its spread, has seen fewer and fewer new COVID-19 cases per day in the past week or two, while the count continues to rise in western Europe and the U.S.

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